Day24

How can you be so sure that there's nothing wrong with it? The errors do not pop up for nothing. Have you tried third party diagnostic software? Have you tried checkdisk and some other software?
Have you tried the same disk in another computer? If there is nothing wrong with the disk itself, putting it in another computer would mean that it would not generate that same message in another vista machine. If it DOES create that message, then there is something wrong with that disk, whether you can still use it or not. Just means that it's a ticking time bomb, waiting to go off....

I'd try to look for some third party diagnostic tools, if I were you, and try to see if they can tell you if anything is wrong with the disk, and if so, what.